The invention discloses an electronic control injection device of a mine car engine. The electronic control injection device comprises an electromagnetic actuator, a moving component, a connection table, a valve cover, a valve seat and a downward convex part. The space between the valve cover and the valve seat is divided by the downward convex part into an oil cavity and a gas cavity. A first hydraulic pipe is arranged on the part, located on the gas cavity, of the valve cover in a penetrating manner. The lower portion of a first push head on the inner wall of the bottom of the first hydraulic pipe is connected with a sprue through a first push rod located in a spring, wherein the sprue right faces a gas inlet. The first hydraulic pipe is connected with an oil tank through a first electromagnetic valve and a first oil pump. A first pressure relief pipe is connected with the oil tank through a second electromagnetic valve and a second oil pump. A through hole is formed in the side face of the upper end of the downward convex part. The top end of a second push head in a round channel is connected with a partition plate through a second push rod, wherein the through hole can be blocked by the partition plate. A second hydraulic pipe is connected with the oil tank through a third electromagnetic valve and a third oil pump. A second pressure relief pipe is connected with the oil tank through a fourth electromagnetic valve and a fourth oil pump. The electronic control injection device can achieve a dual-fuel manner or a pure diesel oil manner in the same valve body and is simple in structure, low in cost and meanwhile good in reliability.