There is no specific symbol for a push button or momentary action switch in the EasyEDA Libs.
However, there are some in the wider library selection that can be found by pressing:
SHIFT+F
in schematic, symbol, PCB or PCB footprint window.
Try searching for terms such as:
Push
Momentary
PBSwitch
If you can't find eaxctly what you are looking for, it is easy enough to edit one of the existing symbols and footprints to suit.
:)
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Brand new interactions and interfaces.
Smooth support for design sizes of over 3W
devices or 10W pads.
More rigorous design constraints, more
standardized processes
For enterprises, more professional users.
Easy to use and quick to get started.
The process supports design scales of 300
devices or 1000 pads.
Supports simple circuit simulation.
For students, teachers, creators.
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
There is no specific symbol for a push button or momentary action switch in the EasyEDA Libs.
However, there are some in the wider library selection that can be found by pressing:
in schematic, symbol, PCB or PCB footprint window.
Try searching for terms such as:
If you can't find eaxctly what you are looking for, it is easy enough to edit one of the existing symbols and footprints to suit.
:)