A laser projection unit, comprising: a light source configured to emit laser; a collimation element configured to collimate the laser, and the collimation element comprising a plurality of lenses, the plurality of lenses being provided in a light emitting path of the light source; and a diffractive optical element configured to diffract the laser collimated by the collimation element to form a laser pattern, characterized in that the collimation element comprises the plurality of the lenses, the plurality of the lenses comprise at least one first type lens and at least one second type lens, the first type lens is made of glass, and the second type lens is made of plastic, wherein the plurality of lenses comprise a first lens, a second lens and a third lens, the first lens, the second lens and the third lens are provided in the light emitting path of the light source in sequence, an optical axis of the second lens is offset relative to an optical axis of the first lens, and the optical axis of the first lens coincides with an optical axis of the third lens; the laser projection unit further comprises a lens barrel, the lens barrel comprises a first segment structure and a second segment structure, the first segment structure is connected to the second segment structure in an inclined manner, the first segment structure is configured to install the first lens and the second lens, and the second segment structure is configured to install the third lens, inner walls of the first segment structure and the second segment structure are coated with reflective coatings for reflecting lights, such that lights emitted by the light source is capable of passing through the first lens, the second lens and the third lens in sequence. a light source configured to emit laser; a collimation element configured to collimate the laser, and the collimation element comprising a plurality of lenses, the plurality of lenses being provided in a light emitting path of the light source; and a diffractive optical element configured to diffract the laser collimated by the collimation element to form a laser pattern, characterized in that the collimation element comprises the plurality of the lenses, the plurality of the lenses comprise at least one first type lens and at least one second type lens, the first type lens is made of glass, and the second type lens is made of plastic, wherein the plurality of lenses comprise a first lens, a second lens and a third lens, the first lens, the second lens and the third lens are provided in the light emitting path of the light source in sequence, an optical axis of the second lens is offset relative to an optical axis of the first lens, and the optical axis of the first lens coincides with an optical axis of the third lens; the laser projection unit further comprises a lens barrel, the lens barrel comprises a first segment structure and a second segment structure, the first segment structure is connected to the second segment structure in an inclined manner, the first segment structure is configured to install the first lens and the second lens, and the second segment structure is configured to install the third lens, inner walls of the first segment structure and the second segment structure are coated with reflective coatings for reflecting lights, such that lights emitted by the light source is capable of passing through the first lens, the second lens and the third lens in sequence.