The invention provides petroleum pipeline primer coating equipment. The petroleum pipeline primer coating equipment comprises a first feeding barrel, a second feeding barrel, a mixing barrel, a machine frame, a coating roller body and a control unit; the first feeding barrel and the second feeding barrel are provided with a feeding port and a discharging pipe respectively, the discharging pipe isprovided with an electric control valve, and the first feeding barrel and the second feeding barrel are fixed on the machine frame respectively; the mixing barrel is fixed at the discharging pipe andis connected with the discharging pipe, a discharging port is formed in the mixing barrel, the coating roller body is arranged at the discharging port, and the control unit is in signal connection with the electric control valve. The petroleum pipeline primer coating equipment has the advantages that the first material is output from the first feeding barrel, the second material is output from thesecond feeding barrel, then the first material and the second material are mixed in the mixing barrel to form a mixed primer solution, the primer solutions are brushed on the area to be repaired by coating roller body, the whole process is automatic and is very convenient, the working efficiency is improved, and the process of preparing the two materials at any time is facilitated.