The invention discloses a convenient-to-overhaul projector for an English classroom in a university. The projector comprises a base housing, a lower cover plate, a projection lens angle adjustment component, a convenient-to-dismount lower connection component, an upper fixing column, an elastic anti-seismic arc spring plate and an upper auxiliary fixing connection component, wherein a heat dissipation component is arranged in the base housing; and the lower cover plate is detachably arranged below the base housing. The projector is very convenient to repair and dismount, and very quick and simple to mount; when the projector is used, the heat dissipation component is good in heat dissipation effect and uniform in heat dissipation; the elastic anti-seismic arc spring plate can well achievea cushioning effect; and the fatigue damage of rigid connection is avoided. When the projector is mounted and dismounted for repair, axial location after clamping is only required; the problem of looseness caused by frequent mounting and dismounting can be avoided; the angle adjustment of a projection lens of the projector is very simple and convenient; an accurate position of a projection frame is facilitated; and the projector can greatly improve the safety and the quality of English teaching.