Liquid material output method adopting metering pumps

The invention provides a liquid material output method adopting metering pumps. The liquid material output method comprises the following steps that N metering pumps used for correspondingly conveyingN kinds of liquid materials are provided, wherein each metering pump comprises a cylinder body and a piston assembly, each cylinder body comprises a fixed cylinder and a cylinder body moving plate, and a cylinder body opening is formed in each fixed cylinder; each cylinder body moving plate is arranged at the corresponding cylinder body opening in a sliding mode, and a cylinder body space is defined by each cylinder body moving plate and the corresponding fixed cylinder; each piston assembly comprises an actuator plate and a piston telescopic part, each actuator plate is arranged on the corresponding fixed cylinder in a sliding mode, each piston telescopic part is connected to the corresponding actuator plate and is in sliding contact with the corresponding fixed cylinder and the corresponding cylinder body movin