The invention discloses a concrete pump truck hopper concrete pumping and sealing device. The device comprises a cement pumping device, an S pipe valve swing mechanism, a sealing mechanism and a hydraulic control system; the cement pumping device comprises a concrete bin, an S pipe valve, an S pipe valve swing seat, a cutting ring, a glasses plate and pumping oil cylinders; the S pipe valve swing mechanism comprises the S pipe valve swing seat, a transmission shaft, a swing rod, a left swing cylinder, a right swing cylinder, a bolt and a hydraulic control system; and the sealing mechanism comprises a sealing oil cylinder, an oil cylinder supporting seat, the glasses plate and the hydraulic control system. A pure mechanical hydraulic manner is adopted to increase the positive pressure between the cutting ring and each glasses plate material hole, and the positive pressure can reach the maximum through increase of the pressure intensity of hydraulic oil; and the device is easy to control, small in size and convenient to machine and manufacture.