A molding machine for making thermoplastic composites comprising: a machine frame including a working stage; a platform mounted on the working stage and including a plurality of channels, and the plurality of channels communicating with each other, the platform also including a plurality of tiny holes which are arranged on a top surface of the platform, the plurality of tiny holes being in communication with the plurality of channels, a connector fixed on one side thereof and communicating with the plurality of channels; a heating device secured on a bottom end of the platform, between the working stage and the platform, and suitable to heat a working material on the top surface of the platform, the working material including a thermoplastic film and a cloth material, wherein the thermoplastic film has a first side surface and a second side surface, and the first side surface of the thermoplastic film has high temperature resistance higher than that of the second side surface of the thermoplastic film, so that when the heating device heats the thermoplastic film, the second side surface of the thermoplastic film and one surface of the cloth material contacting with the thermoplastic film melt, and the first side surface of the thermoplastic film softens; a vacuum means arranged in the machine frame and including a pipe for coupling with the connector of the platform, so that when a control valve is turned on so as to drive the vacuum means to draw the air out of the plurality of channels via the pipe, the plurality of tiny holes suck the working material downwardly, each tiny hole having a diameter of at least 0,001 mm and adapted to suck the working material downwardly; a pressing die movably disposed on a C-shaped rack of the machine frame and moving to and pressing the top surface of the platform; and a gas barrier film being flaky and intended to cover the top surface of the platform completely, so that when the thermoplastic film is placed on the top surface of the platform the first side surface thereof faces downwardly and the cloth material is placed on the thermoplastic film, the gas barrier film covers the cloth material, when a negative pressure lower than atmospheric pressure is produced between the top surface of the platform and the gas barrier film, the gas barrier film presses the cloth material, and when the pressing die moves downwardly, an upper side of the gas barrier film presses downwardly. a machine frame including a working stage; a platform mounted on the working stage and including a plurality of channels, and the plurality of channels communicating with each other, the platform also including a plurality of tiny holes which are arranged on a top surface of the platform, the plurality of tiny holes being in communication with the plurality of channels, a connector fixed on one side thereof and communicating with the plurality of channels; a heating device secured on a bottom end of the platform, between the working stage and the platform, and suitable to heat a working material on the top surface of the platform, the working material including a thermoplastic film and a cloth material, wherein the thermoplastic film has a first side surface and a second side surface, and the first side surface of the thermoplastic film has high temperature resistance higher than that of the second side surface of the thermoplastic film, so that when the heating device heats the thermoplastic film, the second side surface of the thermoplastic film and one surface of the cloth material contacting with the thermoplastic film melt, and the first side surface of the thermoplastic film softens; a vacuum means arranged in the machine frame and including a pipe for coupling with the connector of the platform, so that when a control valve is turned on so as to drive the vacuum means to draw the air out of the plurality of channels via the pipe, the plurality of tiny holes suck the working material downwardly, each tiny hole having a diameter of at least 0,001 mm and adapted to suck the working material downwardly; a pressing die movably disposed on a C-shaped rack of the machine frame and moving to and pressing the top surface of the platform; and a gas barrier film being flaky and intended to cover the top surface of the platform completely, so that when the thermoplastic film is placed on the top surface of the platform the first side surface thereof faces downwardly and the cloth material is placed on the thermoplastic film, the gas barrier film covers the cloth material, when a negative pressure lower than atmospheric pressure is produced between the top surface of the platform and the gas barrier film, the gas barrier film presses the cloth material, and when the pressing die moves downwardly, an upper side of the gas barrier film presses downwardly.