db={"coll":[{"_id":ObjectId("5524d12d2702a21830bdb8e5"),"code":"Apple","name":"iPhone","parameters":[{"code":"xxx","name":"Andrew","value":"9",},{"code":"yyy","name":"Joy","value":"7",},]}]}

db.coll.update({"parameters.name":"Andrew"},{$push:{"parameters":{"code":"$code","name":"bar","value":"10",}}},{multi:true})