A magnetic drive pump having a pump casing, the pump casing made of cast iron or stainless steel including a front support, an inlet, a volute, an outlet, a casing back flange and a casing liner; wherein the pump casing is used for containing an impeller, the inlet is used for being connected to an inlet of the impeller with impeller blades for converting shaft power to hydraulic power, and the pressurized fluid enters the volute and then exits through the outlet; and the magnetic drive pump is characterized in that: the casing liner is installed on a fluid-contacting side inside the pump casing for isolating a corrosive fluid; the casing back flange positioned at a rear end of the pump casing for assembling a bracket and a containment shell; the front support is formed in the inner space of the inlet to be integrated with the pump casing into one piece, the front support extends axially to be a cantilever structure for assembling a stationary shaft mating with an inner rotor to drive the impeller; the front support includes two rib plates, a cone body and a front shaft seat, the front support extends axially toward the inside of the pump casing; the rib plates extend inward from the inner surface of the inlet of the pump casing and combine together at the center of the inner diameter, combining into a right angle structure where the two rib plates are perpendicular to each other; the cone body is formed at the combination of the two ribs plates and the center of the cone body corresponds to the center of the inner diameter of the inlet of the pump casing; the cone body extends inwardly towards the rear side of the pump casing; the front shaft seat is positioned at the rear end of the front support, the rib plates extend axially according to the axial length of the cone body and the width of the rib plates is gradually reduced to match with the outer diameter of the front shaft seat, the front shaft seat passes through a hub aperture of the impeller; the stationary shaft is assembled on a shaft hold hole of the front shaft seat, the shaft hold hole offers a hold length to enhance the stiffness, forces and moments of the stationary shaft applied on the stationary shaft could be transferred to the pump casing via the front support; and the outer surface of the front support is completely encapsulated with a corrosion resistant plastic and is integrated with the casing liner of the pump casing into one piece. the casing liner is installed on a fluid-contacting side inside the pump casing for isolating a corrosive fluid; the casing back flange positioned at a rear end of the pump casing for assembling a bracket and a containment shell; the front support is formed in the inner space of the inlet to be integrated with the pump casing into one piece, the front support extends axially to be a cantilever structure for assembling a stationary shaft mating with an inner rotor to drive the impeller; the front support includes two rib plates, a cone body and a front shaft seat, the front support extends axially toward the inside of the pump casing; the rib plates extend inward from the inner surface of the inlet of the pump casing and combine together at the center of the inner diameter, combining into a right angle structure where the two rib plates are perpendicular to each other; the cone body is formed at the combination of the two ribs plates and the center of the cone body corresponds to the center of the inner diameter of the inlet of the pump casing; the cone body extends inwardly towards the rear side of the pump casing; the front shaft seat is positioned at the rear end of the front support, the rib plates extend axially according to the axial length of the cone body and the width of the rib plates is gradually reduced to match with the outer diameter of the front shaft seat, the front shaft seat passes through a hub aperture of the impeller; the stationary shaft is assembled on a shaft hold hole of the front shaft seat, the shaft hold hole offers a hold length to enhance the stiffness, forces and moments of the stationary shaft applied on the stationary shaft could be transferred to the pump casing via the front support; and the outer surface of the front support is completely encapsulated with a corrosion resistant plastic and is integrated with the casing liner of the pump casing into one piece.